| Autor: |
Nicolas Maring, Kutlu Kutluer, Joachim Cohen, Matteo Cristiani, Margherita Mazzera, Patrick M Ledingham, Hugues de Riedmatten |
| Jazyk: |
angličtina |
| Rok vydání: |
2014 |
| Předmět: |
|
| Zdroj: |
New Journal of Physics, Vol 16, Iss 11, p 113021 (2014) |
| Druh dokumentu: |
article |
| ISSN: |
1367-2630 |
| DOI: |
10.1088/1367-2630/16/11/113021 |
| Popis: |
We report on an experiment that demonstrates the frequency up-conversion of telecommunication wavelength single-photon-level pulses to be resonant with a ${{{\rm Pr} }^{3+}}$ : ${{{\rm Y}}_{2}}{\rm Si}{{{\rm O}}_{5}}$ crystal. We convert the telecom photons at $1570\;{\rm nm}$ to $606\;{\rm nm}$ using a periodically-poled potassium titanyl phosphate nonlinear waveguide. The maximum device efficiency (which includes all optical loss) is inferred to be $\eta _{{\rm dev}}^{{\rm max} }=22\pm 1\%$ (internal efficiency ${{\eta }_{\operatorname{int}}}=75\pm 8\%$ ) with a signal to noise ratio exceeding 1 for single-photon-level pulses with durations of up to 560 ns. The converted light is then stored in the crystal using the atomic frequency comb scheme with storage and retrieval efficiencies exceeding ${{\eta }_{{\rm AFC}}}=20\%$ for predetermined storage times of up to $5\;\mu {\rm s}$ . The retrieved light is time delayed from the noisy conversion process allowing us to measure a signal to noise ratio exceeding 100 with telecom single-photon-level inputs. These results represent the first demonstration of single-photon-level optical storage interfaced with frequency up-conversion. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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